package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;


@Service
public class DishServiceImpl implements DishService {

    @Autowired
    DishMapper dishMapper;

    @Autowired
    DishFlavorMapper dishFlavorMapper;

    @Autowired
    SetmealDishMapper setmealDishMapper;

    @Override
    public PageResult pageDish(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageDish(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }


    @Override
    @Transactional
    public void addDish(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.addDish(dish);

        Long id = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach((dishFlavor) -> {
                dishFlavor.setDishId(id);
            });
        }
        //向口味表中插入数据
        dishFlavorMapper.insertBatch(flavors);


    }

    @Override
    public void deleteDish(List<Long> ids) {
        //判断菜品是否停售
        for (Long id : ids) {
            Dish dish = dishMapper.getByIds(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断套餐是否包含菜品
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品
        for (Long id : ids) {
            //删除菜品
            dishMapper.deleteById();
            //删除口味
            dishFlavorMapper.deleteDishFlvorById(id);
        }
    }

    @Override
    public DishVO getDishId(Long id) {
        //查询菜品
        Dish dish = dishMapper.getDishId(id);
        //查询菜品口味
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    @Override
    public void updateDish(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //获取基本信息修改
        dishMapper.updateDish(dish);
        //删除原有口味
        dishFlavorMapper.deleteDishFlvorById(dishDTO.getId());
        //向口味表中插入数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
        }
        dishFlavorMapper.insertBatch(flavors);
    }

    @Override
    public List<Dish> getCategoryIdByDish(Long id) {
        List<Dish> dish = dishMapper.getCategoryIdByDish(id);
        return dish;
    }

    @Override
    public void getStatus(Integer status, Long id) {
        Dish build = Dish.builder()
                .status(status)
                .id(id)
                .updateUser(BaseContext.getCurrentId())
                .updateTime(LocalDateTime.now())
                .build();
        dishMapper.updateDish(build);
    }

    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getCategoryIdByDish(dish.getCategoryId());

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
